<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form class="login_form" ref="form" :model="form" :rules="rules"  @keyup.enter.native="submitForm('form')">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model.trim="form.username"  placeholder="请输入用户名" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model.trim="form.password" type="password" placeholder="请输入密码"  prefix-icon="iconfont icon-3702mima">  </el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" :loading="loginLoading" @click="submitForm('form')"  >登录</el-button>
          <el-button type="info" @click="resetForm('form')">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      loginLoading: false,
      form: JSON.parse(window.localStorage.getItem('from')) || {},
      rules: {
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created () {

  },
  methods: {
    submitForm (formName) {
      this.$refs[formName].validate((valid) => {
        if (!valid) return
        this.loginLoading = true
        this.$http.post('login', this.form).then(res => {
          res = res.data
          if (res.meta.status === 200) {
            this.$message.success('登录成功')
            window.sessionStorage.setItem('token', res.data.token)
            window.localStorage.setItem('from', JSON.stringify(this.form))

            this.$router.push('/home')
          } else {
            this.$message.error(res.meta.msg || '错误')
          }
        }
        ).catch(err => {
          this.$message.error(err)
        }).finally(() => {
          this.loginLoading = false
        })
      })
    },
    resetForm (formName) {
      this.$refs[formName].resetFields()
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
